For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningFront Side Door Trim Replacement
Front Side Door Pull Handle Bolt
Caution: Refer to Fastener Caution in the Preface section.
Tighten
2 N·m (18 lb in)
Front Side Door Inside Handle Bolt Finish Cap
Tip
Pull handle back to remove cap. Use suitable tool to unsnap.
Front Side Door Inside Handle Bolt
Tighten
...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling
and Enabling.
Disconnect the negative battery cable. Refer to Batter ...
Installation Procedure
Remove the front wheelhouse rear panel brace (1) from service panel.
Create 6 x 20 mm (4/16 x 12/16 in) slots for MIG-brazing along the edges
of the front wheelhouse (1).
Clean and prepare the attaching surfaces for brazing.
Note: In MIG-brazing areas 50 mm (2 in) must b ...